133521143 has 8 divisors (see below), whose sum is σ = 152678400. Its totient is φ = 114384600.

The previous prime is 133521119. The next prime is 133521163. The reversal of 133521143 is 341125331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133521143 - 2¹⁴ = 133504759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133521103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12818 + ... + 20768.

It is an arithmetic number, because the mean of its divisors is an integer number (19084800).

Almost surely, 2^133521143 is an apocalyptic number.

133521143 is a deficient number, since it is larger than the sum of its proper divisors (19157257).

133521143 is an equidigital number, since it uses as much as digits as its factorization.

133521143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10357.

The product of its digits is 1080, while the sum is 23.

The square root of 133521143 is about 11555.1349191604. The cubic root of 133521143 is about 511.1127095921.

Adding to 133521143 its reverse (341125331), we get a palindrome (474646474).

The spelling of 133521143 in words is "one hundred thirty-three million, five hundred twenty-one thousand, one hundred forty-three".